A Case Against Hardware Managed DRAM Caches for NVRAM Based Systems

Non-volatile memory (NVRAM) based on phase-change memory (such as Optane DC Persistent Memory Module) is making its way into Intel servers to address the needs of emerging applications that have a huge memory footprint. These systems have both DRAM and NVRAM on the same memory channel with the smaller capacity DRAM serving as a cache to the larger capacity NVRAM in the so called 2LM mode. In this ...